Here is the full list of all 28 Vampire: The Masquerade - there are Coteries of New York achievements.
Nobody came to your help in the grand finale. Except for...
Complete the game with all three characters.
Meet somebody you used to know in life as the Toreador.
Fail to recruit somebody into your coterie.
Become Embraced into the Toreador clan.
Hope came to your help in the grand finale.
Agathon came to your help in the grand finale.
Complete D'Angelo's questline.
Complete Adelaide Davis' questline ("Somebody's Watching Me") as her bitter foe.
Complete Hope's questlline.
Meet somebody you used to know in life as the Ventrue.
Complete Agathon's questline.
Convince Hope to cooperate with you.
Become Embraced into the Ventrue clan.
Convince Agathon to cooperate with you.
Rage against your fate and complete the game with any character.
D'Angelo came to your help in the grand finale.
Tamika came to your help in the grand finale.
Complete Frank Dougherty's questline ("A Nosy Reporter").
Complete Adelaide Davis' questline ("Somebody's Watching Me") as her latest obsession.
Convince D'Angelo to cooperate with you.
Complete Benoit Segal's questline ("Faith and Myth").
Meet somebody you used to know in life as the Brujah.
Complete Tamika's questline.
Convince Tamika to cooperate with you.
Try running away from Qadir during your trial.
Accept your fate in Elysium.
Become Embraced into the Brujah clan.